Considering the supply and demand of urban heat island mitigation: A study on the construction of “Source-flow-sink” cooling corridor network of blue and green landscape

• Use GWPCA to describe supply and demand of blue-green landscape cooling capacity. • Construct the “source-flow-sink” cooling corridor network to mitigate UHI. • Provide optimization to planning decision from landscape and network perspectives. Ecological spatial planning should be combined with the actual needs of cities to mitigate urban heat island (UHI) effect. This study conducted an analysis of the cooling capacity supply and demand levels in the urban blue-green landscape (UBGL) of Shenyang city, through strategic aim at high levels of supply and demand areas, as well as those with imbalanced supply and demand, planners can allocate resources efficiently to establish an efficient cooling system in order to mitigate UHI. The study used the spatial analysis techniques such as GWPCA, MSPA, MCR in identifying key intervention areas and guiding the development of the cooling network. The results from the landscape perspective showed that GWPC1 (PTV value of 51.51 % ∼ 98.13 %) can explain most of the indicators of supply, and was highly correlated with PLAND BS , LST and PLAND ACI in the study area. From the perspective of network construction, the shortcomings and challenges existing in Shenyang’s cooling network, such as the lack that included the coverage of “working” corridors and spatial inequality, which can be addressed by interconnecting more “source” centers with “sink” centers to optimize cooling capabilities. Overall, the study listed the landscape and network perspective of supply and demand, to full play to the UBGL space cooling effect method to solve the problem of actual UHI’s demand.